单层面温室的宽度一般为（）。
A.2-4m
B.3-4m
C.4-5m
D.4-6m
参考答案：A
Your meaning didn't really _____, John. I didn't _____. [ ]
A. get through; make it
B. get in; catch it
C. get away; help it
D. get across; get it
共同配送是由一个卡车运输者，使用一个运输系统，对多个企业实施配送活动。
